Attachment for blackboards.



F. L. HAI'NLINE. ATTACHMENT FOR BLACKBOARDS.

APPLICATION FILED JUNE 24, 19T4- Patented Dec. 21, 1915.

WITIIVESSES: 7 E/won '7 i BY ,i

I 5 ya A TTORNEY FRANK L. HAINLINE, or names CITY, MISSOURI.

' ATTACHMENT FOE BLACKBOARDS.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed June 24, 1914. Serial No. 846,974.

To all whom it may concern:

Be it known that'I, Fnenn L. HAINLINE, a citizen of'the United" States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Attach ments for l3tlackboards; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

I This invention relates to attachments for blackboards, and particularly to crayon trays designed tocarry the blackboard crayons and erasers, in combination with dust troughs for receiving the dust and waste particles which are continually formed when the blackboard is in use.

The object of the invention is not only to provide a crayon tray which will support the crayons and erasers above the trough and out of contact with the dust therein, butalso to devise a suitable and simple construction whereby the dust will'be collected in the trough and be concealed from view and also be guarded from any disturbance from outside sources. Having this general object in view, the invention will now be described with reference to one form of the same which has been found to be th o-roughly practical and eilicient, as illustrated by the accompanying drawing, in whichv Figure 1 is a vertical longitudinal section through a blackboard attachment embodying the present improvements, the section being taken along the'line II of Fig. 2; Fig. 2 is a section onthe line IIIIof Fig.

I; Fig.3 is a plan view of the attachment with the screen portion of the tray omitted;

Fig. i is a. perspective View of the upper portion of a sectional attachment with the screen partly broken away,- and Fig. 5 is a perspective view of the lower for trough portion ofthe same; both of'these figures,

as well as Fig. 3, beingon a slightly smaller scale than Figs. 1 and 2; Fig. 6 is a frag Inentary plan view of a trough showing another form of clean-out opening. I

The attachment is preferably formed of sheet metal ofsuitable weight and may be of any desired. finish, such as gun-metal, for example, to" match agreeably withthe blackboard. 1

Referring now to the drawing, the lowe ployed, as shown in Fig. 5.

required,

flange 8, in the same horizontal plane with the upper edge of wall 4, adapted to rest upon the'nioldi'ng 1.0 of theblackboard and be secured thereto in any practical manner, as by the nails 12. The ends of the walls 2 and 42 are joined by the end walls lh'either orboth of which may be provided with a clean-out opening 16 at the extreme bottom of the trough. Where the attachment is of such length as to require additional bracing of the side-walls of the trough, intermediate walls 18 of any number may be em- The upper portion of the attachment,

.which comprises the tray for'carrying the.

crayons and erasers, is supported removably upon the upper margins of the trough, and is made in the form of a frame having the longitudinal roll portions 20 resting upon. the bead 6 and the flange 8, respectively, and the end walls or flanges .22 embracing the outer faces of the end walls of the trough, and so inclosing the ends of the trough and covering-th clean-out openings 16. Where a trough of-some length is necessitating the intermediate bracing walls 18, the tray is made in sections with intermediate abutting ends provided with the transverse strips 24: overlying the said intermediate walls 18.v S.pan-.

formed is a screen 26 of suitable mesh topermit the dust and fine particles of refuse to drop into the trough, and the screen'is suspended by having its transverse wires vning the space within the tray framethus carried within the roll portions 20 and hooked over the inner edges thereof, as shown in Fig. 2. 4

-.For the purpose of forming a blind passage from the screen into the trough, a partition. structure is provided beneath the screen, which comprises a pair of inc-lined bailie members 28 and 30 depending, respectively, from the front and rear roll portions 20 and converging downwardlytherefronn the member 28 extending beneath and past the screen 26.

the lower edge of the member 30 into a position overlying the deeper portion of the trough. The lower edge of the brittle member 30 is'provi'dedwith thefingers or lugs 32 adapted to be soldered or otherwise secured to the upper face of the member 28 and to space said members 28 and 30 a suitable distance apart, leaving a dust'passage ap-- proximately equal in width to the mesh of members 28 and 30 extend vertically to'fit vsnuglywithin the front and rear walls (see Fi 2) while the ends of said members abut against the end walls 14 of the trough (of the intermediate walls 18, as the case may use of one of the openings 16, it may bev necessary to provide a suitable clean-out .opening 34- in thebottom of the trough as illustrated in Fig. 6, Which may be kept normally closed by means of a slide cover 36. operating within keeper lugs 38 formed at the sides of said opening.

From the foregoing it will be apparent that a simple and eiiicient structure of neat appearance has been devised for fulfilling the objects of the invention. The removable part of the attachment is held securely in position when in use, and the screen tray permits the dust and waste particles to drop upon the partitioning members 28 and 30 from which they gradually work their way through the dust passage and on into the trough. When in the bottom of thetrough the dust is concealed entirely from viewand is not subject to be disturbed from without,

as by a'gust of wind, or fromi'anyother cause. The clean-out openings are located advantageously for removal of the dust upon lifting the upper portion of the attachment away, and the cross-section of the trough is adapted to cause the dust and refuse to be collected compactly in its extreme lower portion. I Furthermore, this form of trough, provided with thevertical rear wall and the firn'i and'substantial due to the bracing actionofthe front wall-which serves to support'the remainder of the attachment eifec tively and without any tendency to sag out of shape.

WVhile the foregoing represents what is now deemed to be the preferred form of the invention, the right is reserved to such-modifications and changes therein as may fairly I fall within the scope of the appended claims.

Claims: 1. In an attachment for blackboards, a

dust trough, a crayon tray overlying said trough, and a partition structure intermedi- The upper portions of the ate saidtray and trough and blind passage between the two.

providing a 2. In an attachmentfor blackboards," a-

dust trough, a crayon "tray overlying said trough, and a partition structure intermediate said tray and trough comprising a pair trough, and a partition intermediate said tray and troughcom'prising'a pair ofmembers inclined downwardly into the trough with the lower edge of one spaced slightly above the'other member and the latter extending beneath and pastjthe'lower edge of the first memberto form a zigzag passage from the tray into the trough. v

4:. In an attachment forblackboards a dust trough, a crayon-supporting screen overlying saidtrough, anda partition intermediate said screen I and trough and provid ing ablindpassageinto thelatter.

5.'In an attachment for'blackboards, a

dust trough, anda removable crayon-sup porting screen overlying said trough, said screen being provided with a bottom portion adapted to. form a partition between the screen and trough, andsaid bottom p01 tion having an opening provided with a battle guard thereby forming a Zigzag pas sage from the screen into the trough: a

6. In an attachment for blackboards, a dust trough, a crayon-supporting screen overlying said'trough, and'a partitionintermediate said-screen and-trough'and providinga blind passage into the latter, one

dimension of said 'passage being approximately equal to the mesh of thescreen.

dust trough having a rear vertical wall and securing the trough to the blackboard and said front wallhaving'xa marginal bead 1n the samehorizfontal planefas said flange por- 7. In an attachment for blackboards, a

tion, and a crayon tray formed to fit said trough and provided with longitudinal mar j-ginal portions-adapted to restupon and be inclined front wall renders the structure supported by said flange portion" and marginal bead respectively; Y

8. In an attachment forblackboards, a

dust trough having an' opening in one of its end walls, and a crayon tray. removably mounted on said trough and PIOVlClGdQ-Wltll end flanges adapted tofit against the end walls of said trough and'close said opening.

9. In an attachmentfor blackboards, a dust trough having'an op'ening in one ofits end Walls, and a crayon tray removably mounted on said trough,,said tray being provided with a bottom portion depending.

within the trough and fittingbetween'said end Walls and with end flanges adaptedfto fit outside said end walls and close said opening, said bottom portion being formed with a blind passage leading into said trough. 1

'10. In an attachment for blackboards, a dust trough, a crayon tray overlying said trough, and a partition intermediate said tray and trough comprising a pair of members inclined downwardly into the trough with the lower portion of oneextending beneath and on past the lower edge of the other member, the lower edge of said other member being provided with lugs spacing it I from said lower portion to form a passage through said partition. I

Copies of this patent may be obtained for dust trough and a crayon-supporting member mounted removably upon said trough, said member comprising a frame having longitudinal inturned roll portions and a screen spanning said frame and having its transverse wires hooked over the inner edges of said roll portions.

In testimony whereof I afiix my signature in the presence of two witnesses.

FRANK'L. HAINLINE'.

Witnesses:

C. W. GERARD, CONGER R. SMITH.

five centseach, by addressing the Commissioner of Patents, Washington, D. G. 

